On Mon, 12 Dec 2005 11:40:53 -0500, tim hall <tech@xxxxxxxxxxxxxxxxxxxxxxx> wrote: > On Sunday 11 December 2005 21:37, Atte Andr? Jensen was like: >> Suppose I have an A with a frequency of 440 hz. Which formula should I >> use for transposing x semitones up/down? So which frequency would the Bb >> a half step higher for instance have? What about cents (1/100's of half >> steps)? > > It's something like: > Pitch (Hz) = log(27.5/log(2)) + chromatic_note/12 > for 12Tet, but I would check this out as I'm slightly mathematically > dyslexic. The fundamental multiplier is is the 12th root of 2. -- Using Opera's revolutionary e-mail client: http://www.opera.com/mail/
